Anyone knows how

hashCode()

is implemented by the Kotlin compiler in a

data class

having a `fun`ction property constructor parameter? e.g.:

data class Option(val id: Int, val desc: () -> String)

It calls the function :trollface:

Not possible, this would be huge flaw as this is not documented, and this could have side-effects 😛

To be honest I don't know, but I'd guess it is the default hashCode, i.e. takes address of the function object.

@louiscad why would it be a flaw? What's the difference to

data class Foo(val id: Int, val desc: Description)

where

Description

doesn't implement

hashCode()

?

That was a joke on my side.

desc.invoke().hashCode()

@kirillrakhman I said why it'd be a flaw to invoke the property function in

hashCode()

(and

equals(other: Any)

).

Any

already implements

hashCode()

, but it can be less efficient if you stick to the default implementation

Ok I understand. Of course, it doesn't invoke the function.